Does Accounting CS publish a public API?
No. Accounting CS is part of the Thomson Reuters CS Professional Suite, an on-premise product line, and Thomson Reuters does not publish a public API for it. The Thomson Reuters developer portal exists, but it covers ONESOURCE and tax products — not the CS Professional Suite. There are no documented endpoints a third-party platform can use to post transactions into Accounting CS.
What does no API mean for firms running Accounting CS?
Accounting CS is a firm-side system — accounting professionals run books for many clients in it. No public API means no card or expense platform can push client transactions straight into those books. Card activity gets in one of two ways: staff key it in manually, client by client, or it arrives as a file import in a layout Accounting CS accepts.
Manual entry at a firm scales badly. Every client with a card program means statements to collect, receipts to chase, and charges to code to the right accounts before entry. Multiply that across a client list and card transaction entry becomes a real line item in the firm's workload.
How does Vergo work with Accounting CS?
Vergo automates the file-import path. Cardholders — the client's own staff — code each charge in Vergo when they spend, with the receipt attached. Vergo then produces a custom-built CSV export matched to the import format Accounting CS expects, so the firm imports a coded, reviewable batch instead of building a spreadsheet by hand or keying entries one at a time.
This is not an API sync and Vergo does not present it as one; Accounting CS does not offer that option to anyone. It is the dependable automation path for a suite that integrates by file: coding captured once at the point of spend, and a ready import file on the firm's side.
Will the CS suite get a public API?
Thomson Reuters has kept its developer investment on the ONESOURCE and tax side, and the CS Professional Suite remains on-premise with file-based integration. Firms choosing card and expense tooling for their clients should plan around imports rather than wait on an API that is not on the roadmap Thomson Reuters has published.
Does Accounting CS have a public API?
No. Thomson Reuters publishes no public API for Accounting CS or the CS Professional Suite. The TR developer portal covers ONESOURCE and tax products only.
Can an expense platform post directly into client books in Accounting CS?
No platform can — there are no supported endpoints. The working path is a file import in the format Accounting CS accepts, which is how Vergo connects.
How does Vergo get card transactions into Accounting CS?
Cardholders code charges in Vergo with receipts attached, and Vergo generates a custom CSV export matched to Accounting CS's import format. The firm imports the coded batch instead of keying entries.
Does this work across multiple clients?
Yes. Each client's card program is coded in Vergo by that client's cardholders, and the firm receives a clean, matched import file per client rather than a pile of statements and receipts.
